Heat sink or similar article



FIG. 1 is a perspective view of a heat sink or similar article showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is an end view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view of the heat sink or similar article of my invention. 

The ornamental design for a heat sink or similar article, substantially as shown. 